Weighing-scale



S. N. HURT.

WEIGHING SCALE.

APPLICATION FILED DEC. 27, 1920.

Patanted Nov. 22 192K awvewfoz SAMUEL N. HURT, OF TOLEDD, (EH10,ASSIGNOR Tit TOLEDG SCALE COMPANY, @F JE@LEZDO, OHIO, A CORFORATIGN OFNEW JERSEY.

WEIGEING-SGALE.

Specification of Letters Patent.

Patented Nov. 22,1921.

application filed December 27, 1920. Serial Ito. 483,138.

T 0 all whom it may concern:

Be it known that l, SAMUEL N. Home, a citizen of the United States,residing at T0- ledo, in the county of Lucas and State of Uhio, haveinvented certain new and useful Improvements in Weighing-Scales, ofwhich the following is a specification.

This invention relates to weighing scales, and one of its principalobjects is to provide reliable and inexpensive means for securing apivot in place upon a scale lever.

Another object is to provide means for so securing a pivot to a leverthat it may be readily removed or replaced.

Still another object is to provide means whereby the distances betweenpivots may be a veryaccurately adjusted.

-Other objects and advantages will be apparent from the followingdescription,

wherein reference is bad to the accompanying drawings illustratingpreferred embodiments of my invention and wherein similar referencenumerals designate similar parts throughout the several views.

in the drawings Figure l is a fragmentary elevation of a lever showingpreferred means for securing knife-edge pivots of the usual shape;

Fig. 2 1s a fragmentary elevation of a lever showing means for securinganother form thereof; and a Fig. 3 is an enlarged perspective view ofthe pivot bar employed in the form shown in Fig. 2.

Although I have shown my pivot retainer in connection with a lever, itis to be understood that it is also capable of use in securing pivots toother members, such, for example, as endulums or stationary supports.

n the embodiment illustrated in Fig. 1,

the nose of the lever l is provided with a transverse cylindrical bore 2into which are tapped two threaded holes3 leading from the lower side ofthe lever. The pivot retainer in this embodiment consists of a bar ihaving cylindrical surfaces at its sides which substantially fit thesides of the bore 2. In the upper side of the bar 4: is a ii-shapedgroove 5, the apex of which is at the center of curvature of thecylindrical surfaces, and the lower side of the bar is substantiallyfiat, with a kert 6 extending upwardly toward the r: 5.

i en the pivot bar 7, which is of the usual wedge shape, is inserted inthe groove 5, the knife edge of the pivot in this form of the device issubstantially coincident with the axis of the bore 2, so that it theretainer 4 is rotated slightly in thebore, the location of the knifeedge will not change. Set screws 8 and 9 are threaded into the holes 3and forcibly engage with the fiat lower side or the retainer a which,because of the comparatively small amount of metal between the kerf 6and the apex of the groove 5, is deformed by the pressure of the screw,the kerf opening slightly and the sides of the groove being forced intoclamping engagement with the sides of the wedge-shaped pivot 7. Thepivotis thus firmly held in place, but it may nevertheless be easilyremoved when desired.

The form shown in Fig.2 diflers from that shown in Fig. 1 in that thepivot retainer 4* is provided with a bore 5* to receive a cylindricalpivot bar 7 which is cut away at its ends to form wedge-shaped pivots10". A kerf 1P is cut from the outside of the re tainer a into the borea so that when the pivot bar is in the bore and the retainer is inplace, the bar may be securel clamped in the same manner as the-wedge-saped bar in the term first described by turning up the screws 8 and 9and thus to some extent opening the inner kert 6 and closing the outerkerf 11*. v

The knife edge of the pivot in this form is radially spaced from theaxis of the bore 2 so that by'rotating the retainer in the bore thepivot may be moved toward or away from the end of the lever. Thismovement, of course, cants the Wedge-shaped pivots 10 to some extent,but they may be righted by turning the pivot bars 7 in the bores 5*before finally tightening the screws 8 and 9. Slight adjustments may bemade by merely loosening one screw and tightening the other.

While it will be apparent that the illustrated embodiments of myinvention herein disclosed are well calculated to adequately fulfil theobjects primarily stated, it is to be till bore, said pivot retainerhaving a recess adapted to receive the pivot, and means for deformingsaid pivot retainer to clamp said pivot in said recess.

. in, a pivot, a pivot retainer in said bore, said pivot retainer havinga recess to receive the pivot and having a flat surface and a kerfextending from said fiat surface toward said recess, and screws threadedthrough said member and engaging the flat surface of said pivot retaineron opposite sidesof said kerf.

4. In a device of the class described, in combination, a member having abore there in, a pivot bar, a pivot retainer in said bore, said ivotretainer having a substantially cylin rical recess to receive the pivotbar and an opening from said recess through the side of said member,said member also having a flat surface opposite said opening and akerfextending from said fiat surface toward said recess, and screwsthreaded through said member and engaging the flat surface of said pivotretainer on opposite sides of said kerf.

5. In a device of the'class described, in combination, a lever, a pivotretainer adjustably mounted therein, a pivot bar adjustably, mounted insaid pivot retainer, and means for simultaneously locking said pivot barand pivot retainer in adjusted positions. In a device of the classdescribed, in combination, a lever, a pivot retainer rotatablyadjustable in said lever, a pivot bar eccentrically mounted in saidpivot retainer and rotatably adjustable therein, and means forsimultaneously locking said pivot retainer and said pivot bar inadjusted positions.

SAMUEL N. HURT. Witnesses:

FnANcEs DOYLE, MILDRED ANGELL.

